Central extensions, classical non-equivariant maps and residual symmetries

Abstract

The arising of central extensions is discussed in two contexts. At first classical counterparts of quantum anomalies (deserving being named as "classical anomalies") are associated with a peculiar subclass of the non-equivariant maps. Further, the notion of "residual symmetry" for theories formulated in given non-vanishing EM backgrounds is introduced. It is pointed out that this is a Lie-algebraic, model-independent, concept.

8 pages, LaTex. Talk given at the International Conference "Renormalization Group and Anomalies in Gravitation and Cosmology", Ouro Preto, Brazil, March 2003. To appear in the Proceedings

References in corpus (2)

• An Example of Poincare Symmetry with a Central Charge
• Residual Symmetries in the Presence of an EM Background

Cited by in corpus (1)

• On Graph-Theoretic Identifications of Adinkras, Supersymmetry Representations and Superfields